To the OP:
Conceptually a ranger is a non-holy warrior that protects his range, usually a wilderness expanse but it wouldn't be surprising to conceive of a ranger in a more urban setting protecting particular areas there.
They are sometimes depicted as possessing a supernatural connection to their range and sometimes can even call wildlife there to their aid.
That definitely ties into the name "Ranger" as well. Good distillation. Do you feel like this connection to a place to be protected is the core of the Ranger?